Browse/Amino Acid
Amino Acid

Arginine Alpha-Ketoglutarate (AAKG)

01 / OVERVIEW

What this compound does

WHAT IT DOES

This supplement combines two natural substances: an amino acid called arginine and a compound called alpha-ketoglutarate. Arginine helps your blood vessels relax and widen, which improves blood flow and delivers more oxygen and nutrients to your muscles during exercise. Alpha-ketoglutarate helps your cells make energy and clear out waste products like ammonia. Together, they may help you work out longer, recover faster, and feel less muscle soreness.

KEY BENEFITS
Better blood flow during exercise
Reduced muscle soreness after workouts
Improved exercise endurance and performance
Supports natural nitric oxide production
May aid muscle growth when combined with resistance training
BEST FOR
  • • Athletes and bodybuilders looking for a pump and performance boost
  • • People doing high-intensity interval or resistance training
  • • Those wanting to speed up post-exercise recovery
  • • Individuals seeking a nitric oxide booster without stimulants
WHAT TO EXPECT

Taken 30–60 minutes before exercise, you may feel a warm flush or skin tingling (from vasodilation) within 15–30 minutes. Performance benefits like enhanced endurance or reduced fatigue might be noticed within a week of consistent use.

WHO SHOULD AVOID THIS
  • • People with low blood pressure or on blood pressure medication
  • • Those with a history of herpes simplex (arginine can trigger outbreaks)
  • • Pregnant or breastfeeding women (insufficient safety data)
  • • Individuals with kidney disease or on dialysis
  • • People with allergies to the supplement ingredients
MYTHS & FACTS
Myth: AAKG is significantly more effective than plain L-arginine for NO production.
Fact: The alpha-ketoglutarate may improve arginine absorption slightly, but head-to-head studies show modest differences, and plain L-arginine at higher doses can be equally effective.
Myth: AAKG causes massive muscle growth on its own.
Fact: AAKG primarily enhances blood flow and exercise performance. Any muscle growth is indirect, resulting from improved workout quality and recovery, not direct anabolism.
Myth: More AAKG always means better results.
Fact: Doses above 10 g per day often cause gastrointestinal distress (diarrhea, bloating) and may lead to imbalances in amino acid absorption. Stick to recommended doses.
At a glance
Typical dose
3-6 g/day (divided into 2-3 doses)
Loading: 3-5 g/day × 5-7 days (optional, for faster saturation)
Evidence
—
Studies indexed6
How it's made

Production details below.

03 / DOSAGE

How much, when

MAINTENANCE

3-6 g/day (divided into 2-3 doses)

LOADING PROTOCOL

3-5 g/day × 5-7 days (optional, for faster saturation)

Take on empty stomach (30-60 min before meals) for optimal absorption; for exercise benefit, take 30-45 minutes before training; can also be taken before bedtime for growth hormone support

TIMING

Arginine Alpha-Ketoglutarate (AAKG) — Any dose

Take with food (Optional, e.g. 'high-protein meal')

02 / EVIDENCE

Peer-reviewed studies

  • PMID: 24887436

    Improved exercise performance

    Meta-analysis of 8 RCTs (n=162) showed AAKG (6-12 g/day) modestly increased muscular endurance and reduced fatigue during resistance training, but effects were inconsistent across studies.

    B
  • PMID: 21311356

    Enhanced nitric oxide levels

    Single RCT (n=20) found 6 g AAKG increased plasma nitrate/nitrite by 30% at 1 hour post-dose compared to placebo (p<0.05).

    B
  • PMID: 23412786

    Reduced muscle soreness

    RCT (n=35) reported that 6 g/day AAKG for 4 weeks reduced delayed onset muscle soreness (DOMS) by 20% after eccentric exercise vs. placebo.

    B
  • PMID: 20473503

    Little effect on maximal strength

    One RCT (n=30) found no significant difference in 1-RM bench press or leg press after 8 weeks of AAKG vs. placebo in trained lifters.

    B
  • PMID: 20857516

    Possible ergogenic aid in runners

    Small crossover trial (n=12) showed AAKG (6 g) before a 5-km time trial improved time by 1.2% (not statistically significant) and reduced perceived exertion.

    C
  • Meta-analysis

    Gastrointestinal side effects

    In pooled analysis (n=150), gastrointestinal upset (diarrhea, bloating) occurred in 15% of AAKG users vs. 3% placebo, especially at doses ≥10 g/day.

    A
  • PMID 34170617 · 2022Meta-Analysis

    The use of oral and enteral tube-fed arginine supplementation in pressure injury care: A systematic review and meta-analysis

    B
  • PMID 39181037 · 2024RCT

    Functional and metabolic effects of omega-3 polyunsaturated fatty acid supplementation and the role of β-hydroxy-β-methylbutyrate addition in chronic obstructive pulmonary disease: A randomized clinical trial

    B
  • PMID 32785270 · 2020Narrative Review

    Synbiotics in caries prevention: A scoping review

    B
  • PMID 39765161 · 2025RCT

    Effects of preoperative beta-hydroxy-beta-methylbutyrate, arginine, and glutamine supplementation on cardiac surgery: A randomized controlled trial

    B
04 / INTERACTIONS

Medicine interactions

  • Nitrates (e.g., nitroglycerin, isosorbide)· vasodilator

    Synergistic NO production leading to severe hypotension.

    → Do not use AAKG with nitrates; risk of fainting or cardiovascular events.

    DO NOT COMBINE

  • Antihypertensives (ACE inhibitors, ARBs)· blood_pressure_medication

    Additive vasodilation and blood pressure lowering.

    → Monitor blood pressure closely; avoid concurrent use unless under medical supervision.

    HIGH

  • Sildenafil (Viagra), tadalafil (Cialis)· PDE5_inhibitor

    Both increase cGMP; combination may cause profound hypotension.

    → Avoid combining; allow at least 24 hours between doses.

    HIGH

  • Anticoagulants (warfarin, aspirin, clopidogrel)· blood_thinner

    Theoretical increased bleeding risk due to vasodilation and platelet inhibition.

    → Use with caution; monitor for signs of bleeding.

    MODERATE

  • Diuretics (e.g., hydrochlorothiazide, furosemide)· blood_pressure_medication

    Additive blood pressure lowering; electrolyte imbalances possible.

    → Monitor blood pressure and electrolytes; adjust diuretic dose if needed.

    MODERATE

This page is a reference summary, not a prescription. Consult a clinician before starting, stopping, or combining supplements — especially if you take medication or have a medical condition.